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An Interactive Prover for Protocol Verification in the Computational Model

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Résumé

Given the central importance of designing secure protocols, providing solid mathematical foundations and computer-assisted methods to attest for their correctness is becoming crucial. Here, we elaborate on the formal approach introduced by Bana and Comon in [10], [11], which was originally designed to analyze protocols for a fixed number of sessions and which more importantly lacks support for proof mechanization. In this paper, we present a framework and an interactive prover allowing to mechanize proofs of security protocol for an arbitrary number of sessions in the computational model. More specifically, we develop a meta-logic as well as a proof system for deriving security properties. Proofs in our system only deal with high-level, symbolic representations of protocol executions, similar to proofs in the symbolic model, but providing security guarantees at the computational level. We have implemented our approach within a new interactive prover, the SQUIRREL prover, taking as input protocols specified in the applied pi-calculus, and we have performed a number of case studies covering a variety of primitives (hashes, encryption, signatures, Diffie-Hellman exponentiation) and security properties (authentication, strong secrecy, unlinkability).
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Dates et versions

hal-03172119 , version 1 (17-03-2021)

Identifiants

  • HAL Id : hal-03172119 , version 1

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David Baelde, Stéphanie Delaune, Charlie Jacomme, Adrien Koutsos, Solène Moreau. An Interactive Prover for Protocol Verification in the Computational Model. SP 2021 - 42nd IEEE Symposium on Security and Privacy, May 2021, San Fransisco / Virtual, United States. ⟨hal-03172119⟩
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